<template>
  <div>
    <!-- 面包屑导航区域 -->
    <el-breadcrumb separator-class="el-icon-arrow-right">
        <el-breadcrumb-item :to="{ path: '/HOME' }">首页</el-breadcrumb-item>
        <el-breadcrumb-item>权限管理</el-breadcrumb-item>
        <el-breadcrumb-item>角色列表</el-breadcrumb-item>
    </el-breadcrumb>
    <!-- 卡片视图 -->
    <el-card>
      <!-- 添加角色按钮 -->
      <el-row>
        <el-col>
          <el-button type="primary"  @click="addRoleDialogVisible = true">添加角色</el-button>
        </el-col>
      </el-row>
      <!-- 角色列表区域 -->
      <el-table :data="roleList" border stripe>
        <!-- 展开列 -->
        <el-table-column type='expand'>
          <template slot-scope='scope'>
            <el-row v-for="(item1, i1) in scope.row.children" :key="item1.id" :class="['vcenter', 'bdbottom', i1 === 0 ? 'bdtop' : '']">
              <!-- 一级权限 -->
              <el-col :span='5'>
                <el-tag closable @close="removeRightById(scope.row, item1.id)">{{ item1.authName }}</el-tag>
                <i class="el-icon-caret-right"></i>
              </el-col>
              <!-- 二级和三级权限 -->
              <el-col :span='19'>
                <!-- 通过循环嵌套渲染二级权限 -->
                <el-row v-for="(item2, i2) in item1.children" :key="item2.id" :class="['vcenter', i2 ===0 ?'' : 'bdtop']">
                  <el-col :span='6'>
                    <el-tag type="success" closable @close="removeRightById(scope.row, item2.id)">{{ item2.authName }}</el-tag>
                    <i class="el-icon-caret-right"></i>
                  </el-col>
                  <el-col :span='18'>
                    <el-tag type='warning' v-for='(item3) in item2.children' :key="item3.id" closable @close="removeRightById(scope.row, item3.id)">
                      {{ item3.authName }}
                    </el-tag>
                  </el-col>
                </el-row>
              </el-col>
            </el-row>
          </template>
        </el-table-column>
        <!-- 索引列 -->
        <el-table-column label='排序' type='index' width="50px"></el-table-column>
        <el-table-column label='角色名称' prop='roleName'></el-table-column>
        <el-table-column label='角色描述' prop='roleDesc'></el-table-column>
        <el-table-column label='操作' width="300px">
          <template slot-scope="scope">
            <el-button size='mini' type="primary" icon="el-icon-edit" @click="showEditRoleDialog(scope.row.id)">编辑</el-button>
            <el-button size='mini' type="danger" icon="el-icon-delete" @click="removeRoleById(scope.row.id)">删除</el-button>
            <el-button size='mini' type="warning" icon="el-icon-setting" @click="showSetRightDialog(scope.row)">分配权限</el-button>
          </template>
        </el-table-column>
      </el-table>
    </el-card>

    <!-- 添加角色的对话框 -->
    <el-dialog title="添加角色" :visible.sync="addRoleDialogVisible" width="30%">
      <!-- 主题区域 -->
      <el-form :model="addRoleForm" :rules="addRoleFormRules" ref="addRoleFormRef" label-width="80px" >
        <el-form-item label="角色名称" prop="roleName">
          <el-input v-model="addRoleForm.roleName"></el-input>
        </el-form-item>
        <el-form-item label="角色描述" prop="roleDesc">
          <el-input v-model="addRoleForm.roleDesc"></el-input>
        </el-form-item>
      </el-form>
      <!-- 底部区域 -->
      <template #footer>
        <span class="dialog-footer">
          <el-button @click="dialogVisible = false">取 消</el-button>
          <el-button type="primary" @click="addRole">确 定</el-button>
        </span>
      </template>
    </el-dialog>

    <!-- 编辑角色的对话框 -->
    <el-dialog title="编辑角色" :visible.sync="editRoleDialogVisible" width="30%">
      <!-- 主题区域 -->
      <el-form :model="editRoleForm" :rules="editRoleFormRules" ref="editRoleFormRef" label-width="80px" >
        <el-form-item label="角色名称" prop="roleName">
          <el-input v-model="editRoleForm.roleName"></el-input>
        </el-form-item>
        <el-form-item label="角色描述" prop="roleDesc">
          <el-input v-model="editRoleForm.roleDesc"></el-input>
        </el-form-item>
      </el-form>
      <!-- 底部区域 -->
      <template #footer>
        <span class="dialog-footer">
          <el-button @click="editRoleDialogVisible = false">取 消</el-button>
          <el-button type="primary" @click="editRole">确 定</el-button>
        </span>
      </template>
    </el-dialog>
  <!-- 分配权限的对话框 -->
    <el-dialog title="分配权限" :visible.sync="SetRightDialogVisible" width="50%" @close='defKeys = []'>
      <!-- 树形显示 -->
      <el-tree :data="rightsList" :props="treeProps" show-checkbox node-key='id' default-expand-all :default-checked-keys='defKeys' ref="treeRef"></el-tree>
      <template #footer>
        <span class="dialog-footer">
          <el-button @click="SetRightDialogVisible = false">取 消</el-button>
          <el-button type="primary" @click="allotRights">确 定</el-button>
        </span>
      </template>
    </el-dialog>
  </div>
</template>

<script>
export default {
  data () {
    return {
      // 所有角色列表数据
      roleList: [],
      addRoleDialogVisible: false,
      editRoleDialogVisible: false,
      SetRightDialogVisible: false,
      roleId: '',
      // 树形组件绑定对象
      treeProps: {
        label: 'authName',
        children: 'children'
      },
      // 默认选中的id数组
      defKeys: [],
      addRoleForm: {
        roleName: '',
        roleDesc: ''
      },
      // 所有权限的数据
      rightsList: {},
      editRoleForm: {},
      // 编辑角色表单验证规则对象
      addRoleFormRules: {
        roleName: [{ required: true, message: '请输入角色名称', trigger: 'blur' }, { min: 3, max: 10, message: '角色名称的长度在3 - 10', trigger: 'blur' }],
        roleDesc: [{ required: false, message: '请输入角色描述', trigger: 'blur' }]
      },
      editRoleFormRules: {
        roleName: [{ required: true, message: '请输入角色名称', trigger: 'blur' }, { min: 3, max: 10, message: '角色名称的长度在3 - 10', trigger: 'blur' }],
        roleDesc: [{ required: false, message: '请输入角色描述', trigger: 'blur' }]
      }
    }
  },
  created () {
    this.getRolesList()
  },
  methods: {
    // 获取角色按钮
    async getRolesList () {
      const { data: res } = await this.$http.get('roles')
      if (res.meta.status !== 200) return this.$message.error('获取角色列表失败')
      this.roleList = res.data
      console.log(this.roleList)
    },
    addRole () {
      this.$refs.addRoleFormRef.validate(async valid => {
        if (!valid) return
        // 可以发起添加用户的网络请求
        const { data: res } = await this.$http.post('roles', this.addRoleForm)
        if (res.meta.status !== 201) {
          this.$message.error('编辑角色失败！')
        } else {
          this.$message.success('编辑角色成功')
        }
        this.addRoleDialogVisible = false
        this.getRolesList()
      })
    },
    async showEditRoleDialog (id) {
      const { data: res } = await this.$http.get('roles/' + id)
      if (res.meta.status !== 200) {
        return this.$message.error('查询用户信息失败！')
      }
      this.editRoleForm = res.data
      this.editRoleDialogVisible = true
    },
    editRole () {
      this.$refs.editRoleFormRef.validate(async valid => {
        if (!valid) return
        // 发起修改请求
        const { data: res } = await this.$http.put('roles/' + this.editRoleForm.roleId, { roleName: this.editRoleForm.roleName, roleDesc: this.editRoleForm.roleDesc })
        if (res.meta.status !== 200) {
          return this.$message.error('更新用户失败')
        }
        this.editRoleDialogVisible = false
        this.getRolesList()
        this.$message.success('更新用户成功')
      })
    },
    removeRoleById (id) {
      // 询问是否删除数据
      this.$confirm('此操作将永久删除该用户, 是否继续?', '提示', {
        confirmButtonText: '确定',
        cancelButtonText: '取消',
        type: 'warning'
      }).then(async () => {
        const { data: res } = await this.$http.delete('roles/' + id)
        if (res.meta.status !== 200) {
          this.$message({
            type: 'error',
            message: '删除失败!'
          })
        } else {
          this.$message({
            type: 'success',
            message: '删除成功!'
          })
          this.getRolesList()
        }
      }).catch(() => {
        this.$message({
          type: 'info',
          message: '已取消删除'
        })
      })
    },
    removeRightById (role, rightId) {
      // 弹框提示是否删除
      this.$confirm('此操作将永久删除该用户, 是否继续?', '提示', {
        confirmButtonText: '确定',
        cancelButtonText: '取消',
        type: 'warning'
      }).then(async () => {
        const { data: res } = await this.$http.delete(`roles/${role.id}/rights/${rightId}`)
        if (res.meta.status !== 200) {
          this.$message({
            type: 'error',
            message: '删除失败!'
          })
        } else {
          role.children = res.data
          this.$message({
            type: 'success',
            message: '删除成功!'
          })
        }
      }).catch(() => {
        this.$message({
          type: 'info',
          message: '已取消删除'
        })
      })
    },
    // 展示分配权限的对话框
    async showSetRightDialog (role) {
      this.roleId = role.id
      const { data: res } = await this.$http.get('rights/tree')
      if (res.meta.status !== 200) {
        this.$message.error('获取权限列表失败')
      }
      // 把获取到的权限列表赋值给rightsList
      this.rightsList = res.data
      // 递归获取三级权限id
      this.getLeafKeys(role, this.defKeys)
      this.SetRightDialogVisible = true
    },
    // 递归查询所有三级权限id
    getLeafKeys (node, arr) {
      if (!node.children) {
        return arr.push(node.id)
      }
      node.children.forEach(item => {
        this.getLeafKeys(item, arr)
      })
    },
    // 为角色分配权限
    async allotRights () {
      const keys = [
        ...this.$refs.treeRef.getCheckedKeys(),
        ...this.$refs.treeRef.getHalfCheckedKeys()
      ]
      const idStr = keys.join(',')
      const { data: res } = await this.$http.post(`roles/${this.roleId}/rights`, { rids: idStr })
      if (res.meta.status !== 200) {
        return this.$message.error('分配失败')
      }
      this.$message.success('分配成功')
      this.getRolesList()
      this.SetRightDialogVisible = false
    }
  }
}
</script>

<style lang="less" scoped>
.el-tag {
  margin: 7px;
}
.bdtop {
  border-top: 1px solid #eee;
}
.bdbottom {
  border-bottom: 1px solid #eee;
}
.vcenter {
  display: flex;
  align-items: center
}
</style>
